A little sanity checker.

[uccvend-snackrom.git] / ROM2 / display_basic.c

diff --git a/ROM2/display_basic.c b/ROM2/display_basic.c
index 72d8ac0..9d3264e 100644 (file)
--- a/ROM2/display_basic.c
+++ b/ROM2/display_basic.c
@@ -13,36 +13,42 @@
 void display_send_byte(char c);
 void display_reset();
 
-void set_msg(char newmsg[10]) {
+void set_msg(char newmsg[11]) {
        int i;
        display_reset();
+       spi_enable();
        for (i=0; i < 10; i++) {
+               if (newmsg[i] == 0) break;
+       }
+       for (i--; i >= 0; i--) {
                display_send_byte(newmsg[i]&0x7f);
        }
+       spi_disable();
 }
 
 void display_send_byte(char c) {
        bset_misc_output(A3800_DISPLAY_WRITE);  /* enable the display clock */
 
        _io_ports[M6811_SPDR] = c;                  /* load SPI with byte */
-       while(!(_io_ports[M6811_SPDR]&M6811_SPIE)); /* wait for completion */
-       _io_ports[M6811_SPDR];                      /* SPDR read to clear SPIE flag */
+       while(!(_io_ports[M6811_SPSR]&M6811_SPIF)); /* wait for completion */
+       _io_ports[M6811_SPDR];                      /* SPDR read to clear SPIF flag */
 
        bclr_misc_output(A3800_DISPLAY_WRITE);  /* disable the display clock */
 }
 
-#define DISPLAY_DELAY  100 /* ms to delay between ops - could be tweaked */
+#define DISPLAY_DELAY  50 /* ms to delay between ops - could be tweaked */
 void display_reset() {
        /* lower the reset line for a while */
        bclr((void*)&_io_ports[M6811_PORTA], PORTA_DISP_RESET);
        delay(DISPLAY_DELAY);
        bset((void*)&_io_ports[M6811_PORTA], PORTA_DISP_RESET);
+       delay(DISPLAY_DELAY);
 
        spi_enable();
-       delay(DISPLAY_DELAY);
 
        display_send_byte(0xC0 | 10);    /* tell the controller there are 10 digits */
-       display_send_byte(0xE0);    /* set duty cycle to 100%                  */
+       //display_send_byte(0xE0);    /* set duty cycle to 0%                  */
+       display_send_byte(0xFF);    /* set duty cycle to 100%                */
 
        spi_disable();
 }